Teflon avɔ siwo me dzoxɔxɔ le ŋutɔ wɔlawo ɖee fia be fafa ƒe agbɔsɔsɔme dzi kpɔkpɔe nye mɔnu si le tẽ wu eye wòwɔa dɔ nyuie wu si dzi woato akpɔ kristalo ƒe nɔnɔme dzi. Ne PTFE ƒo keŋkeŋ wu 380°C vɔ la, molecule kɔsɔkɔsɔwo ɖoa ɖoɖo ɖe kristalo lattices me ne woto kristalo ƒe dzoxɔxɔ ƒe dzoxɔxɔ si sɔ gbɔ wu si nye 310~315°C me le fafaɣi. Fafa ƒe agbɔsɔsɔme ye afia kristalo nuto ƒe agbɔsɔsɔme kple nusuekpɔmɔ̃ ƒe nɔnɔme si le nusi wotsɔ blae ŋu.
1. Fafa kabakaba (tsitretsitsi) na kristalo si bɔbɔ
Wotoa ya fafɛ ƒe xɔmetsovɔwo, fafamɔ̃wo alo tsigoe siwo me dzoxɔxɔ le si sɔ dzi naa avɔ si wotsɔ dzo wɔe la ƒe anyime fa kabakaba. Wotsɔa molecule kɔsɔkɔsɔawo tsia tsikpe me hafi woɖoa wo ɖe ɖoɖo nu edziedzi, eye wowɔa kristalo-ku suesuesue siwo mede blibo o gbogbo aɖewo. Nusiwo wotsɔ blae si wokpɔ la ƒe nɔnɔme fafɛ kple sesẽme nyuitɔ kekeake kple non-stick dɔwɔwɔ nyuitɔ kekeake, esime eƒe sesẽme kple eƒe vuvu ƒe tsitretsitsi dzi ɖe kpɔtɔ vie.
2. Fafa blewu (annealing) na kristalo ƒe ŋusẽ gã
Woɖoa dzoxɔxɔ takpɔkpɔ ƒe akpa aɖe ɖe dzodoƒea ƒe dodoƒe, alo wotsɔa dzodoƒea fa avɔa le blewu ŋutɔ si nye 10~50°C/h. Esia wɔnɛ be molecule kɔsɔkɔsɔwo ʋãna ale gbegbe be wowɔa spherulites gã siwo de blibo. Nusi wotsɔ blae la ƒo adegbe le sesẽme gã, tsitretsitsi ɖe eƒe vuvu ŋu ɖedzesi kple eƒe didime ƒe liƒo si li ke, gake eƒe asitɔtrɔ le nɔnɔmewo ŋu dzi ɖe kpɔtɔ eye eƒe gbagbã dzi ɖe edzi.
II. Kpekpeɖeŋunaɖoɖo kple Nuwo Dzi Kpɔkpɔ
Le fafa ƒe agbɔsɔsɔme ƒe ɖoɖowɔwɔ dzi la, kpeɖeŋutɔ afɔɖeɖe siwo gbɔna ate ŋu atrɔ asi le PTFE ƒe nutsyɔnu ƒe kristalo ŋu nyuie wu.
1. Sintering dzoxɔxɔ kple ɣeyiɣi si woatsɔ alée
Ele be woado dzo nusi wotsɔ wɔe la wòade 380~400°C eye woalée ɖe te ɣeyiɣi si sɔ be wòaƒo kristalo gbãtɔawo keŋkeŋ eye wòaɖe dzoxɔxɔ ŋutinya ɖa. Sintering si mesɔ o agblẽ kristalo nuclei susɔeawo ɖi, si ana kristalo mamlɛtɔ nasɔ gbɔ akpa eye womama ɖe ɖoɖo nu o.
2. Dzoxɔxɔ le atikewɔwɔ vɔ megbe
Le nusiwo wotsɔ blaa nu siwo ƒe kristalo le sue si wokpɔ to fafa kabakaba me gome la, woate ŋu akpɔ kristalo ƒe tsitsi evelia kple ememe nuteɖeamedzi ɖeɖeɖa to dzoxɔxɔ si nɔa anyi ɖaa ƒe dɔwɔwɔ le 300 ~ 320°C hena gaƒoƒo geɖe si kplɔe ɖo kple fafa blewu, si dzia nusi wotsɔ blaa nu ƒe kristalo ɖe edzi le mɔ si sɔ nu.
3. Nu xoxowo ƒe molecule ƒe kpekpeme
PTFE ƒe kaka si ƒe molecule ƒe kpekpeme lolo la ɖea melt viscosity gã kple molecule chain mobility si bɔbɔ, si wɔnɛ be kristalo ƒe tsɔtsɔme blewu. Le fafa ƒe nɔnɔme mawo ke me la, ele bɔbɔe be woadzra nusiwo wotsɔ blaa nu siwo ƒe kristalo mebɔ o ɖo.
4. Nucleating agent ƒe kpeɖeŋutɔ
Agbɔsɔsɔ sue aɖe (0.1%~1%) si nye inorganic fillers alo perfluorinated copolymers ate ŋu ana heterogeneous kristalo nuclei gbogbo aɖewo eye wòana kristalo nukuwo nakɔ ŋutɔ. Togbɔ be mate ŋu atrɔ kristalo ƒe nɔnɔme bliboa kura o hã la, enaa kristalo ƒe nusuekpɔmɔ̃a nyona ɖe edzi nyuie.
III. Dɔdzikpɔkpɔ bliboe na Multi-Layer Coating Production
Wowɔa teflon avɔ si me dzoxɔxɔ le ŋutɔ to tsidedee kple sintering ƒe mɔnu geɖe me kple nusiwo wotsɔ ƒoa ƒu vivivi, si bia be woakpɔ dɔwɔwɔ dzi si woɖo taɖodzinu na abe alesi gbɔna ene.
1. Interlayer kristalo ƒe wɔwɔme ƒe ɖekawɔwɔ
Vovototo gã si gbɔ eme le fafa ƒe agbɔsɔsɔ me le ƒuƒoƒoawo dome ana ƒuƒoƒoawo dome kristalo nawɔ ɖeka eye wòahe ememe nuteɖeamedzi vɛ, si ana nusiwo wotsɔ blae ƒe ʋuʋu gɔ̃ hã naɖe le nɔnɔme sesẽwo me. Wokafui be woaxɔ fafa fafɛ na domedome ƒuƒoƒo, eye woawɔ fafa kabakaba alo blewu si woɖo taɖodzinu na na gotagome ƒuƒoƒoa ko le ewɔwɔ ƒe nudidiwo nu.
2. Coating titrime ŋusẽkpɔɖeamedzi
Nusiwo wotsɔ blaa nu siwo le kpekpem wu la kpea fu le fafa si mewɔ ɖeka kple ɣeyiɣi ɖeka o si le anyigba kple ememe ƒuƒoƒo dome. Ememe ƒuƒoƒoa dina be yeawɔ kristalo gã le dzoxɔxɔ ƒe kaka blewu ta. Ele be woadidi sintering ɣeyiɣia ɖe edzi wòasɔ be woakpɔ egbɔ be dzoxɔxɔ si le nusi wotsɔ blae bliboa ŋu sɔ hafi woawɔ fafa ƒe ɖoɖo ɖeka.
3. Tension matching le fafaɣi
Tete si wotsɔna ƒoa avɔa ƒe anyime le fafa ƒe akpaa kpɔa ŋusẽ ɖe molecule kɔsɔkɔsɔwo ƒe ɖoɖo dzi, si kpena ɖe kristalowɔwɔ ƒe ɖoɖoa ŋu eye wòwɔa ɖeka dea dzesi kristalo ƒe nɔnɔme mamlɛtɔ kple eƒe didime ƒe liƒo. Ele be woakpɔ edzi le ɖoɖo nu eye woawɔe pɛpɛpɛ.
IV. Agbɔsɔsɔme De dzesi Krystallinity
Ele be woaxɔ Differential Scanning Calorimetry (DSC) atsɔ aɖo kpe kristalo ƒe nɔnɔme dzi le asitɔtrɔ le dɔwɔwɔ ŋu vɔ megbe. Wodoa dzo 5 ~ 10mg ƒe nutsyɔnu ƒe kpɔɖeŋu le agbɔsɔsɔ si nye 10°C/min be woado enthalpy si le ʋeʋẽm la kpɔ. Wobua kristalo ƒe akɔnta to mama si wodo kpɔ ƒe ʋeʋẽ ƒe enthalpy kple nukpɔsusu ƒe ʋeʋẽ ƒe enthalpy si nye 100% kristalo PTFE (si ade 82J/g) me. Ne wotsɔe kpe ɖe bending resistance, wear resistance kple dɔwɔwɔ dodokpɔ bubuwo ŋu la, woate ŋu anya dɔwɔwɔ ƒe fesre nyuitɔ kekeake.
Dɔwɔwɔ ƒe Gɔmeɖose Gbãtɔwo : Be nàkpɔ kristalo si mebɔ o la, wɔe be nàtsi enumake le sintering blibo megbe; be nàkpɔ kristalo si lolo la, na dzoxɔxɔ si nɔa anyi ɖaa nate ɖe 310°C ŋu eye nàtsɔe akplɔe ɖo blewu ŋutɔ le eƒe dzoxɔxɔ blibo megbe.
Esi míelé dɔnyala kple fɔmaɖimaɖi ƒe subɔsubɔdɔ ƒe xexemenunya me ɖe asi ta la, míeɖoe kplikpaa be míana egbɔkpɔnuwo le teƒe ɖeka kple subɔsubɔdɔ siwo ŋu wobua tame na asisiwo katã!
